I kind of figured the best way to do pressure sensing on this kind of thing wouldn’t be pressure sensors (you’d need to put in a lot of them, and that’s expensive + multiple points of failure), but rather a cheap accelerometer in the middle of the bag. Maybe two, one at the top and one at the bottom.

Knowing the weight of the bag and the acceleration when it was hit, you could pretty easily deduce the force applied by the punch. With two accelerometers, you might be able to figure out where it was hit, too.

i probably know what they had in there for it to change colors them glow sticks ppls use for raving them liquid cus i used to hang them and jab and it changes colors and glow darker to light but nice bag tho